Plant Material
Four soybean genotypes viz., PI342618B-drought-tolerant parent (DTP;Glycine soja Sieb. & Zucc.), NN86-4-drought-sensitive parent (DSP; Glycine max L.), A214-drought-tolerant line (DTL) and A195-drought-sensitive line (DSL) were used for investigation of drought stress response in the present study. The A214/DTL and A195/DSL are two introgression lines derived from NN86-4 × PI342618B cross through repeated backcrossing of three times with the cultivated recurrent parent NN86-4. All the plant materials were received from National Center for Soybean Improvement, Nanjing Agricultural University, Jiangsu Province, China.